Melts were cooled in studies on the ferrite phase of portland cement clinker in which the ratio of C2F to C6A2F varied at various rates. By analyzing the crystals with a microprobe demonstrated the existence of crystals in which Fe (Iron) content decreased continuously from the center to the periphery. Because of this type of crystallization, it is possible for crystals of C3A and C12A7 to be formed from melts which at equilibrium should contain only crystals of a ferrite phase. On the basis of these results, liquidus and solidus curves have been established for the solid solutions series as the pseudo-binary system "C2A" - C2F which differs from values published earlier. Research has also established that the equation representing the mechanism involved in the reaction of C4AF with water is as follows: C4AF + 1OH = C3FH6 + 1/3 C2AH6 + 4/3 Al(OH)3.

  • Corporate Authors:

    United States Gypsum Company

    Department No. 119-7, 101 South Wacker Drive
    Chicago, IL  United States  60606
  • Publication Date: 1975-10

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Filing Info

  • Accession Number: 00127949
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 10 1976 12:00AM